Title
- Commentary on Porphyry1
- Commentary on Sentences1
- Commentary on the Ephemerides1
- Common book1
- Commonplace book1
- Compendio delle istorie di Pisa1
- Compendium iuris canonici1
- Compendium of biblical topics1
- Compendium religiosi vivendi1
- Complaints1
- Conclusions1
- Confessio Catholicae fidei Christiana1
- Confessional1
- Confessionale : Defecerunt scrutantes scrutinio version, and other texts.1
- Confessione generale1
- Confutatio libelli Philippi Melanchtonis cuius titulus est De officio principum1
- Coniecturarum liber1
- Constitution1
- Contra Julianum1
- Contra impedimiam1